{"id":"preorder-iterator-validates-factory-method-recursive-infrastructure","text":"PreorderIterator's stack-of-iterators implementation — where each Composite node produces its own iterator via CreateIterator() factory method — concretely validates Factory Method's role as enabling infrastructure for recursive traversal: polymorphic iterator creation via factory methods is not just a convenience but a structural necessity for traversing heterogeneous composite trees where each node type may require different iteration behavior.","truth_value":"IN","source":"","source_url":"","source_hash":"","justifications":[{"type":"SL","antecedents":["preorder-iterator-stack-of-iterators","iterator-factory-method-creates-appropriate-iterator","recursive-structure-complete-infrastructure"],"outlist":[],"label":"PreorderIterator's stack-of-factory-created-iterators concretely demonstrates Factory Method as recursive traversal infrastructure"}],"dependents":["factory-method-recursive-infrastructure-validates-creational-behavioral-integration"],"metadata":{"source_type":"derived","review_result":"unnecessary"},"created_at":"2026-06-18T01:48:11+00:00","updated_at":"2026-06-18T06:15:08+00:00","reviewed_at":"2026-06-18T06:15:08+00:00","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"preorder-iterator-validates-factory-method-recursive-infrastructure","truth_value":"IN","reason":"SL justification valid","antecedents":["preorder-iterator-stack-of-iterators","iterator-factory-method-creates-appropriate-iterator","recursive-structure-complete-infrastructure"],"label":"PreorderIterator's stack-of-factory-created-iterators concretely demonstrates Factory Method as recursive traversal infrastructure"},{"node":"preorder-iterator-stack-of-iterators","truth_value":"IN","reason":"premise"},{"node":"iterator-factory-method-creates-appropriate-iterator","truth_value":"IN","reason":"premise"},{"node":"recursive-structure-complete-infrastructure","truth_value":"IN","reason":"SL justification valid","antecedents":["composite-iterator-visitor-recursive-triad","composite-flyweight-scalable-trees"],"label":"The triad handles traversal and operations while Flyweight handles sharing; together they address all three concerns (access, extension, scale) for recursive structures"},{"node":"composite-iterator-visitor-recursive-triad","truth_value":"IN","reason":"SL justification valid","antecedents":["composite-uniform-leaf-composite-treatment","iterator-separates-traversal-from-aggregate","visitor-enables-open-ended-operations","gof-iterator-related-composite-factory-memento"],"label":"Four base beliefs establish that these three patterns address orthogonal concerns over the same recursive data; the triad is the emergent structural relationship"},{"node":"composite-uniform-leaf-composite-treatment","truth_value":"IN","reason":"premise"},{"node":"iterator-separates-traversal-from-aggregate","truth_value":"IN","reason":"premise"},{"node":"visitor-enables-open-ended-operations","truth_value":"IN","reason":"premise"},{"node":"gof-iterator-related-composite-factory-memento","truth_value":"IN","reason":"premise"},{"node":"composite-flyweight-scalable-trees","truth_value":"IN","reason":"SL justification valid","antecedents":["composite-as-universal-recursive-structure","flyweight-solves-composite-sharing"],"label":"Two depth-1 conclusions about Composite's structure and Flyweight's optimization combine into a single scalable-tree design"},{"node":"composite-as-universal-recursive-structure","truth_value":"IN","reason":"SL justification valid","antecedents":["composite-uniform-leaf-composite-treatment","interpreter-abstract-syntax-tree-is-composite","macrocommand-is-composite-of-commands"],"label":"Three distinct patterns reuse Composite's recursive composition structure"},{"node":"interpreter-abstract-syntax-tree-is-composite","truth_value":"IN","reason":"premise"},{"node":"macrocommand-is-composite-of-commands","truth_value":"IN","reason":"premise"},{"node":"flyweight-solves-composite-sharing","truth_value":"IN","reason":"SL justification valid","antecedents":["flyweight-solves-composite-sharing","flyweight-intrinsic-vs-extrinsic-state","flyweight-doc-editor-180k-chars-480-objects"],"label":"Flyweight's state-splitting mechanism directly solves Composite's sharing problem"},{"node":"flyweight-solves-composite-sharing","truth_value":"IN","reason":"circular dependency"},{"node":"flyweight-intrinsic-vs-extrinsic-state","truth_value":"IN","reason":"premise"},{"node":"flyweight-doc-editor-180k-chars-480-objects","truth_value":"IN","reason":"premise"}]}}